解方程.包括解比例.5.4+4.6x=32.64/5:5/6=x：x/12x/6=5/8

5.4+4.6x=32.6
4.6x=32.6-5.4
x=27.2 ÷4.6
x=5.9130434782609
4/5:5/6=x：x/12
5x/6=4/5*1/2
x=2/5÷5/6
x=12/25
x/6=5/8
x=5/8*6
x=15/4